In-wheel motor with brake

Abstract

The utility model relates to power motor technical field, especially a wheel hub motor with brake, including fixed shaft, motor module, brake device, rotor shell, output transmission device and wheel hub shell, motor module sets up on fixed shaft, rotor shell is provided with bearing and is connected with fixed shaft, motor module is used for driving rotor shell rotation, brake device sets up at one end of fixed shaft to be used for rotor shell brake, one end of rotor shell is connected with output transmission device to drive wheel hub shell rotation through output transmission device. The utility model integrates brake device in the inside of wheel hub shell, is used for braking to rotor shell, makes that wheel hub motor has built -in brake structure, realizes the built -in brake of wheel hub motor.

Description

Technical Field

[0001] This utility model relates to the field of power motor technology, and in particular to a hub motor with brake. Background Technology

[0002] Currently, in-wheel motors, as a core component of the power system of electric mobile vehicles, are widely used due to their compact structure and high transmission efficiency. However, traditional in-wheel motors have significant shortcomings in braking: they typically require the installation of external braking devices, such as hydraulic disc or drum brakes, resulting in a complex overall structure, large space occupation, and increased difficulty in chassis layout and overall vehicle weight. Furthermore, external braking systems act on the outside of the wheel hub through friction, leading to problems such as delayed braking response, significant energy loss, and limited control precision, especially under frequent start-stop or high-speed emergency braking conditions, where stability and reliability are insufficient. On the other hand, some existing solutions attempt to integrate the braking structure inside the motor, but these often place the braking elements on rotating parts, leading to dynamic balance challenges, high installation complexity, and reduced durability, while also causing inconvenience and high cost in maintenance. Therefore, the industry urgently needs a highly integrated, fast-responding, and highly reliable in-wheel motor with built-in braking to optimize vehicle braking performance and improve overall energy efficiency and safety. Utility Model Content

[0003] To solve the above problems, this utility model integrates the braking device inside the hub housing for braking the rotor housing, thus enabling the hub motor to have a built-in braking structure and achieving a hub motor with built-in braking.

[0004] The technical solution adopted by this utility model is: a hub motor with brake, including a fixed shaft, a motor module, a braking device, a rotor housing, an output transmission device, and a hub housing; the motor module is mounted on the fixed shaft, the rotor housing is provided with a bearing and connected to the fixed shaft, the motor module is used to drive the rotor housing to rotate, the braking device is located at one end of the fixed shaft and is used to brake the rotor housing; one end of the rotor housing is connected to the output transmission device, and the output transmission device drives the hub housing to rotate.

[0005] A further improvement to the above scheme is that the fixed shaft includes a first connecting end, a braking end, a motor mounting end, and a second connecting end arranged in sequence. The first connecting end and the second connecting end are respectively connected to both ends of the hub housing. The hub housing is provided with a mounting cavity, and the braking device, rotor housing, and output transmission device are all arranged in the mounting cavity.

[0006] A further improvement to the above solution is that a control circuit board is provided inside the motor module, and a wiring hole is provided on the fixed shaft. One end of the wiring hole is connected to the rotor housing and is used to connect the control circuit board.

[0007] A further improvement to the above scheme is that the motor module includes a stator element and a rotor element, the stator element is disposed on a fixed shaft, the rotor element is disposed on a rotor housing, and the stator element is opposite to the rotor element.

[0008] A further improvement to the above scheme is that the braking device is a miniature ultra-thin power-off brake, and the rotor housing is provided with a brake end cover and an output end cover at both ends, the brake end cover is connected to the brake disc of the braking device, and the output end cover is provided with an output element connected to the output transmission device.

[0009] A further improvement to the above scheme is that both the brake end cover and the output end cover are provided with inner bearings, and are connected to the fixed shaft through the inner bearings.

[0010] A further improvement to the above scheme is that the rotor housing is provided with an output element, the output element is an output gear, the output transmission device includes an output bracket, a planetary gear and an output gear ring, the output bracket is mounted on a fixed shaft, the planetary gear is provided with a first meshing gear disk and a second meshing gear disk, the first meshing gear disk meshes with the output gear, and the second meshing gear disk is connected to the output gear ring.

[0011] A further improvement to the above scheme is that the output bracket is provided with an output bearing, and a connecting shaft is provided between the first meshing toothed disc and the second meshing toothed disc, and the connecting shaft is connected to the output bearing.

[0012] A further improvement to the above solution is that the hub housing includes an outer hub, a first end cover, and a second end cover. The first end cover and the second end cover are respectively disposed at both ends of the outer hub, and both the first end cover and the second end cover are provided with end cover bearings connected to a fixed shaft.

[0013] A further improvement to the above solution is that a wheel bushing is provided on the outer periphery of the outer hub, and the first end cap and the second end cap are respectively provided at both ends of the outer hub and are respectively used to abut the two ends of the wheel bushing.

[0014] The beneficial effects of this utility model are: Compared to existing hub motors, this invention integrates the braking device inside the hub housing for braking the rotor housing, thus enabling the hub motor to have a built-in braking structure and achieve internal braking. The braking device is located at one end of the fixed shaft and acts directly on the rotor housing, avoiding the complex layout and reliability risks associated with installing a braking mechanism on rotating parts. This results in faster braking response, higher transmission efficiency, and easier precise control. Bearings reliably connect the rotor housing to the fixed shaft, capable of bearing radial and axial loads, ensuring transmission stability and long service life. The output transmission device effectively transmits the rotor torque to the hub housing, meeting the requirements for high-efficiency drive and facilitating optimization of speed ratio and torque distribution according to different operating conditions. This facilitates assembly and maintenance, reduces manufacturing costs and repair difficulty, and provides reliable parking and emergency braking capabilities for the vehicle, improving safety. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the hub motor with brake of this utility model; Figure 2 for Figure 1 Front view schematic diagram of a hub motor with integrated brake; Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 1 A partial structural diagram of a hub motor with integrated brakes; Figure 5 for Figure 1 A partial structural diagram of a hub motor with integrated brakes.

[0016] Explanation of reference numerals in the attached drawings: Fixed shaft 1, First connecting end 11, Braking end 12, Motor mounting end 13, Second connecting end 14, Wiring hole 15, Motor module 2, Control circuit board 21, Stator element 22, Rotor element 23, Braking device 3, Brake disc 31, Rotor housing 4, Braking end cover 41, Output end cover 42, Output element 421, Output transmission device 5, Output bracket 51, Planetary gear 52, First meshing gear disc 521, Second meshing gear disc 522, Connecting shaft 523, Output gear ring 53, Hub housing 6, Outer hub 61, First end cover 62, Second end cover 63, Wheel sleeve 64. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-5 As shown, in one embodiment of this utility model, a hub motor with a brake is disclosed, comprising a fixed shaft 1, a motor module 2, a braking device 3, a rotor housing 4, an output transmission device 5, and a hub housing 6. The motor module 2 is mounted on the fixed shaft 1, and the rotor housing 4 is connected to the fixed shaft 1 via a bearing. The motor module 2 drives the rotor housing 4 to rotate. The braking device 3 is located at one end of the fixed shaft 1 and is used to brake the rotor housing 4. One end of the rotor housing 4 is connected to the output transmission device 5, which in turn drives the hub housing 6 to rotate. In this embodiment, the braking device 3 is integrated inside the hub housing 6 to brake the rotor housing 4, thus enabling the hub motor to have a built-in braking structure and achieve built-in braking. The braking device 3 is located at one end of the fixed shaft 1 and acts directly on the rotor housing 4, avoiding the complex arrangement and reliability issues associated with installing a braking mechanism on rotating parts. This results in fast braking response, high transmission efficiency, and easier precise control. The bearing reliably connects the rotor housing 4 to the fixed shaft 1, can bear radial and axial loads, and ensures transmission stability and long service life. The output transmission device 5 effectively transmits the rotor torque to the hub housing 6, which not only meets the requirements for high-efficiency drive but also facilitates optimization of speed ratio and torque distribution according to different operating conditions. This facilitates assembly and maintenance, reduces manufacturing costs and repair difficulty, and provides the vehicle with reliable parking and emergency braking capabilities, thus improving safety.

[0020] The fixed shaft 1 includes a first connecting end 11, a braking end 12, a motor mounting end 13, and a second connecting end 14 arranged sequentially. The first connecting end 11 and the second connecting end 14 are respectively connected to both ends of the hub housing 6. The hub housing 6 has a mounting cavity, and the braking device 3, rotor housing 4, and output transmission device 5 are all housed within the mounting cavity. In this embodiment, the first connecting end 11 and the second connecting end 14 are respectively connected to both ends of the hub housing 6, enabling the hub housing 6 to rotate more stably under the support of the fixed shaft 1, reducing vibration and eccentricity caused by centrifugal force and load changes. The mounting cavity provides space for the rational layout of the braking device 3, rotor housing 4, and output transmission device 5, effectively reducing interference between components and improving overall integration. All key components are concentrated in the mounting cavity, simplifying the assembly process and facilitating later maintenance and repair. The centralized layout also effectively reduces power loss, improves transmission efficiency, and ensures that the motor maintains a high-efficiency and stable operating state during operation.

[0021] A control circuit board 21 is installed inside the motor module 2. The fixed shaft 1 has a wiring hole 15, one end of which connects to the rotor housing 4 and is used to connect the control circuit board 21. In this embodiment, the integration of the control circuit board 21 enables precise control and adjustment of the motor, including dynamic adjustment of speed, torque, and braking, thereby meeting the operational requirements under different working conditions. The wiring hole 15 effectively solves the electrical connection problem, ensuring the reliability and stability of signal transmission inside the motor. It also prevents physical damage during wiring, thereby improving the durability and safety of the system.

[0022] The motor module 2 includes a stator element 22 and a rotor element 23. The stator element 22 is mounted on a fixed shaft 1, and the rotor element 23 is mounted on a rotor housing 4, with the stator element 22 and rotor element 23 facing each other. In this embodiment, the rational layout of the stator and rotor achieves efficient electromagnetic coupling, maximizing the energy conversion efficiency of the motor. The fixed design of the stator element 22 ensures that the motor maintains a stable electromagnetic field during operation, thereby providing a continuous and powerful driving force for the rotor element 23. Combining the stator element 22 with the fixed shaft 1 enhances the overall rigidity and stability of the motor. It reduces vibration and noise caused by rotor rotation, improving the smoothness of motor operation.

[0023] The braking device 3 is a miniature ultra-thin power-off brake. The rotor housing 4 has a brake end cover 41 and an output end cover 42 at both ends. The brake end cover 41 is connected to the brake disc 31 of the braking device 3, and the output end cover 42 has an output element 421 connected to the output transmission device 5. Specifically, both the brake end cover 41 and the output end cover 42 are equipped with internal bearings and connected to the fixed shaft 1 via these bearings. In this embodiment, the use of the miniature ultra-thin power-off brake enables the motor to brake quickly and reliably when power is lost, ensuring vehicle safety in emergency situations. The ultra-thin design of the brake not only reduces the structural volume but also allows for a compact motor layout, contributing to lighter electric vehicles. The connection between the brake end cover 41 and the brake disc 31 of the braking device 3 achieves efficient power transmission and braking response. Simultaneously, the combination of the output element 421 on the output end cover 42 and the output transmission device 5 ensures accurate transmission of rotation signals and efficient energy output, thereby enhancing the overall performance and response speed of the motor. This allows the motor to quickly adapt and adjust its output under different operating conditions, improving vehicle handling. The miniature ultra-thin power-off brake is a device that rapidly applies braking in the event of a power outage or failure.

[0024] The rotor housing 4 is equipped with an output element 421, which is an output gear. The output transmission device 5 includes an output bracket 51, a planetary gear 52, and an output gear ring 53. The output bracket 51 is mounted on a fixed shaft 1. The planetary gear 52 has a first meshing gear disc 521 and a second meshing gear disc 522. The first meshing gear disc 521 meshes with the output gear, and the second meshing gear disc 522 is connected to the output gear ring 53. Specifically, the output bracket 51 is equipped with an output bearing, and a connecting shaft 523 is provided between the first meshing gear disc 521 and the second meshing gear disc 522, connecting the connecting shaft 523 to the output bearing. In this embodiment, the output bracket 51 is fixed on the fixed shaft 1, ensuring the stability and rigidity of the entire transmission system. This effectively reduces the relative displacement between moving parts, thereby reducing the probability of wear and failure, and improving the overall reliability of the motor. The design of the planetary gear 52 system, especially the combination of the first meshing gear disc 521 and the output gear, makes power transmission more efficient. The multi-point contact characteristics of the planetary gears 52 enable greater torque transmission, improving the motor's output capacity. High transmission efficiency is maintained under varying load conditions. The connection between the second meshing gear disc 522 and the output gear ring 53 further enhances the smoothness and flexibility of the output. This allows the output gear ring 53 to operate smoothly at different speeds, promoting smoother power output and improving vehicle handling during driving. The arrangement of the connecting shaft 523 and the output bearing ensures precise alignment and good support for the planetary gear system 52.

[0025] The wheel hub housing 6 includes an outer wheel hub 61, a first end cap 62, and a second end cap 63. The first end cap 62 and the second end cap 63 are respectively disposed at both ends of the outer wheel hub 61. Both the first end cap 62 and the second end cap 63 are provided with end cap bearings and connected to the fixed shaft 1. Specifically, a wheel bushing 64 is disposed on the outer periphery of the outer wheel hub 61. The first end cap 62 and the second end cap 63 are respectively disposed at both ends of the outer wheel hub 61 and are used to abut the two ends of the wheel bushing 64. In this embodiment, the design of the outer wheel hub 61 enables the motor to effectively support the wheel bushing 64, providing better grip and power transmission performance. The outer periphery of the wheel bushing 64 ensures full contact with the ground, enhancing traction and stability, and effectively improving driving safety, especially under different road conditions. The placement of the first end cap 62 and the second end cap 63 not only provides necessary support for the outer wheel hub 61, but also ensures the stability and rigidity of the entire wheel hub motor system through the connection between the end cap bearings and the fixed shaft 1. The first end cap 62 and the second end cap 63 respectively abut against the two ends of the wheel bushing 64, providing good sealing and protection.

[0026] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A hub motor with a brake, characterized in that: It includes a fixed shaft, a motor module, a braking device, a rotor housing, an output transmission device, and a hub housing; the motor module is mounted on the fixed shaft, the rotor housing is connected to the fixed shaft with bearings, the motor module is used to drive the rotor housing to rotate, the braking device is located at one end of the fixed shaft and is used to brake the rotor housing; one end of the rotor housing is connected to the output transmission device, and the output transmission device drives the hub housing to rotate.

2. The hub motor with brake according to claim 1, characterized in that: The fixed shaft includes a first connecting end, a braking end, a motor mounting end, and a second connecting end arranged in sequence. The first connecting end and the second connecting end are respectively connected to the two ends of the hub housing. The hub housing is provided with a mounting cavity, and the braking device, rotor housing, and output transmission device are all arranged in the mounting cavity.

3. The hub motor with brake according to claim 1, characterized in that: The motor module is equipped with a control circuit board, and the fixed shaft is provided with a wiring hole. One end of the wiring hole is connected to the rotor housing and is used to connect the control circuit board.

4. The hub motor with brake according to claim 1, characterized in that: The motor module includes a stator element and a rotor element. The stator element is mounted on a fixed shaft, and the rotor element is mounted on a rotor housing. The stator element and the rotor element are opposite to each other.

5. The hub motor with brake according to claim 1, characterized in that: The braking device is a miniature ultra-thin power-off brake. The rotor housing has a brake end cover and an output end cover at both ends. The brake end cover is connected to the brake disc of the braking device, and the output end cover is provided with an output element that is connected to the output transmission device.

6. The hub motor with brake according to claim 5, characterized in that: Both the brake end cover and the output end cover are equipped with inner bearings, and are connected to the fixed shaft through the inner bearings.

7. The hub motor with brake according to claim 1, characterized in that: The rotor housing is provided with an output element, which is an output gear. The output transmission device includes an output bracket, a planetary gear, and an output gear ring. The output bracket is mounted on a fixed shaft. The planetary gear is provided with a first meshing gear disc and a second meshing gear disc. The first meshing gear disc meshes with the output gear, and the second meshing gear disc is connected to the output gear ring.

8. The hub motor with brake according to claim 7, characterized in that: The output bracket is equipped with an output bearing, and a connecting shaft is provided between the first meshing toothed disc and the second meshing toothed disc, the connecting shaft being connected to the output bearing.

9. The hub motor with brake according to claim 1, characterized in that: The hub housing includes an outer hub, a first end cover, and a second end cover. The first end cover and the second end cover are respectively disposed at both ends of the outer hub. Both the first end cover and the second end cover are provided with end cover bearings and connected to a fixed shaft.

10. The hub motor with brake according to claim 9, characterized in that: The outer circumference of the outer hub is provided with a wheel bushing, and the first end cap and the second end cap are respectively provided at both ends of the outer hub and are respectively used to abut the two ends of the wheel bushing.

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